Heyl Testomat NH2CL-R User manual

1
Testomat®Modul NH2CL-R
Process Photometer Module
for Monochloramine
parameterisable via RS232
Operating Instructions

Content
2
Content
Content................................................................................................2
Important safety information............................................................4
Intended use ........................................................................................4
Qualification of personnel ....................................................................4
Warnings in this manual.......................................................................5
Additional documentation.....................................................................5
Special attention is required at this point.............................................5
General Information .............................................................................5
Requirements for the installation site...................................................5
Requirements of cable for operating voltage and system components
and installed lines ................................................................................6
Requirements for cable ducts..............................................................6
During assembly ..................................................................................6
During operation ..................................................................................7
During cleaning....................................................................................8
Repairing a defective device................................................................8
During disposal ....................................................................................8
Operating requirements.......................................................................9
Scope of delivery ............................................................................ 10
Performance specifications........................................................... 10
Interaction with the controller............................................................ 10
Measurement calculation.................................................................. 11
Assembly......................................................................................... 12
Assembling the Testomat®Modul NH2CL-R.................................... 12
Use of the Testomat®Modul NH2CL-R within a pressure range of 0.3
to 1 bar.............................................................................................. 12
Connecting the water intake and discharge...................................... 13
Water intake...................................................................................... 13
Water drain........................................................................................ 14
Connect mains and devices.............................................................. 14
Block diagram of Testomat®Modul NH2CL-R.................................. 15
Connecting inputs and outputs ......................................................... 16
Internal design Testomat®Modul NH2CL-R..................................... 17
Commissioning............................................................................... 18
Inserting the reagent bottle............................................................... 18
Opening the water inlet..................................................................... 18
Venting reagent lines ........................................................................ 19
Functions of the operating and display elements....................... 20
Function keys.................................................................................... 20
Additional control elements on the circuit board............................... 20
Display elements of the function keys .............................................. 21
Adjusting parameters in the device.............................................. 22
Calling up selection mode on the device .......................................... 22
Starting USB communication............................................................ 22
Entering parameters via the Service Monitor program..................... 22
Exiting selection mode...................................................................... 23
Start of measurements...................................................................... 23
Other functions in selection mode .................................................... 23
Functions of the SD card .................................................................. 24
Storage of measured values and alarms.......................................... 24

Content
3
Functions of the USB connection...................................................... 25
The Service Monitor program........................................................ 27
Installing the Service Monitor............................................................ 27
Selecting language ........................................................................... 28
Adjusting, saving and loading parameters........................................ 28
Example: Changing the measurement interval in the Service Monitor
for Testomat®Modul NH2CL-R......................................................... 31
Description of the signal inputs and outputs .............................. 32
Control input STOP/START.............................................................. 32
Fault signal output “Alarm”................................................................ 33
Current output 4-20 mA .................................................................... 33
Calculation of output currents........................................................... 33
Serial interface.................................................................................. 34
Notification format............................................................................. 34
Remote control via RS232 interface................................................. 34
The IMPORT command.................................................................... 35
The EXPORT command................................................................... 35
The command CS_ERR ................................................................... 36
The command SW_RST................................................................... 36
Formation of the checksum............................................................... 36
Further explanations on programming.............................................. 36
Error messages and troubleshooting.................................................. 38
Temporary faults............................................................................... 38
Error messages................................................................................. 38
Reagent shortage ............................................................................. 40
Correct water level in the measuring chamber ................................. 41
Maintenance message...................................................................... 42
Maintenance .................................................................................... 43
Cleaning intervals ............................................................................. 43
Service instructions........................................................................... 43
Cleaning of the measuring chamber and the sight-glass windows... 44
Cleaning the filter housing ................................................................ 44
Changing an empty reagent bottle.................................................... 45
Replacing a reagent bottle without a shortage notification............... 46
Maintenance message pump head................................................... 46
Firmware update ............................................................................. 47
Firmware update error list................................................................. 47
Optional display for measured value display .............................. 49
Testomat®Modul NH2CL-R spare parts and accessories.......... 51
Reagents........................................................................................... 52
Additional accessories...................................................................... 52
Technical data................................................................................. 53
Conformity Declaration ..................................................................... 54

Important safety information
4
Important safety information
Read the operating instructions carefully and in full before working
with the device.
Ensure that the operating instructions are accessible at any time for
all users. When an SD card is used in the device, it can also be
stored on the same as a PDF file.
If transferring the Testomat®Modul NH2CL-R device to third parties,
ensure these operating instructions are always included.
Observe the safety precautions and safety recommendations when
using reagents, chemicals and cleaning agents. Observe the relevant
safety data sheet! For reagents we supply, the relevant safety data
sheets are available online at www.heylanalysis.de.
Intended use
The Testomat®NH2CL module process photometer is a robust wet-
chemical online transmitter for monitoring the decay behaviour in
cooling towers after shock chlorination. The measuring range for
monochloramine (NH2Cl, calculated as Cl2) is 0 to 5 ppm.
Comply with the output limits specified in the Technical data section
on page 53.
Observe the areas and limits of application of the indicators and the
requirements imposed by the medium to be measured on page 9.
The scope of intended use presumes that you have read and under-
stood the instructions and particularly the section Important safety in-
formation.
Improper use is deemed to occur if you use the device
•outside the applicable scope, as specified in these instructions,
•under operating conditions that deviate from the scope specified in
these instructions.
Qualification of personnel
The assembly and commissioning require basic electrical and process
engineering expertise as well as knowledge of the applicable specialist
terms. The assembly and commissioning must therefore be performed
only by a specialist or a properly trained person instructed and super-
vised by a specialist.
A specialist is a person who can draw on professional training,
knowledge and experience as well as knowledge of applicable provi-
sions to assess work assigned to him/her, detect potential hazards and
implement suitable safety measures. A specialist must comply with the
applicable professional rules.

Important safety information
5
Warnings in this manual
These instructions include warnings against specified actions that in-
volve the risk of injury or property damage. Warnings are structured
as follows:
Description of the type or source of danger
Description of the consequences of non-compliance
Hazard prevention indications. Compliance with these hazard pre-
vention measures is imperative.
The signal word "RISK" refers to a significant danger that represents
a direct threat and will definitely result in severe injuries or even be
fatal if not avoided.
The signal word “WARNING" refers to a possible danger that may re-
sult in severe injuries or even be fatal if not avoided.
The signal word "CAUTION" refers to a potentially dangerous situa-
tion that could result in minor to moderate injuries or property dam-
age if not avoided.
The signal word "NOTE" refers to important pieces of information. If
this information is not heeded, it may adversely affect operational
procedures.
Additional documentation
The Testomat®Modul NH2CL-R is a system component. Accordingly,
you should also observe the system documentation of the system
manufacturer.
Special attention is required at this point
General Information
•During assembly and commissioning, observe the specific national
and local requirements.
•Observe the accident prevention and conservation requirements in
the country of use and at the installation site.
•Make no changes or modifications to the device that go beyond the
scope of use specified in these instructions. Doing so will void the
warranty.
Requirements for the installation site
Ensure that the following conditions are met at the installation site:
•Use the device in indoor locations only.
•The ambient temperature is between 10 and 40 °C.
•The installation site is at altitudes under 2000 m.
•The maximum relative humidity is 80 % at temperatures of up to
31 °C (linear declining up to 50 % relative humidity at 40 °C).
SIGNAL WORD!
WARNING
!
CAUTION
!
DANGER
!
NOTE
WARNING
!

Important safety information
6
•The device must always be protected against wetness and mois-
ture. Under no circumstances may it be exposed to splashed water
or condensate.
•Surge category II
•Soiling degree II
Requirements of cable for operating voltage and
system components and installed lines
Use only cables and installed lines which meet the following require-
ments:
•The terminal strips on the circuit board require core cross-sections
of between 0.08 and 2.5 mm2. This applies to single-wire and fine-
wire cores with wire end ferrules without plastic collar.
For fine-wire cores with wire end ferrules and plastic collar, the
cross-section may be up to 1.5 mm2.
For single-wire cores, AWG28 –AWG12 can also be used.
•The cable ducts installed by the manufacturer in the device have a
clamping range of 4.5 to 10 mm. This means that the external di-
ameter of the laid cable must remain within the range of 4.5 to 10
mm. If you use other ducts, the cable diameters must correspond
to the ducts.
Optimum cross-section of the cores
If the core cross-section is less than 0.5 mm2, jamming may occur
when the cores are loosened from the terminal strip. We therefore
recommend using wires with cross-sections greater than 0.5 mm2.
Requirements for cable ducts
•The recesses in the housing are intended for M16 ducts.
•The ducts should have a smooth and rounded opening (to protect
against bending and abrasion).
•The duct should include a strain relief that prevents slippage of the
cable and that cannot be disengaged without a tool.
•You can order cable ducts from us as spare parts (see Testomat®
Modul NH2CL-R spare parts and accessories on page 51).
During assembly
•Always disconnect the relevant system component from the power
source before assembling the device or connecting it to the power
supply or disconnecting it from the same. Prevent any inadvertent
reactivation of the device.
•Only connect the device to the operating voltage as specified on
the type plate.
•Observe the technical data and the environmental parameters.
WARNING
!
NOTE

Important safety information
7
•The connections for operating voltage and relay outputs must be
laid separately from each other, to guarantee corresponding insu-
lation between the cables.
Avoiding interference voltages
The Testomat®Modul NH2CL-R device requires stable and uninter-
rupted supply voltage. Where applicable, use a mains filter to shield
the Testomat®Modul NH2CL-R device from interference voltages,
which may be generated for example within the network by magnetic
valves or large-scale engines. Never lay the connecting cables in par-
allel to mains cables.
Handling may cause damage or destruction of electrical compo-
nents!
If you need to open the upper door, you should take the necessary
safety measures to avoid electrostatic discharge onto the compo-
nents (ESD safety).
Make sure you are earthed before opening the casing.
During operation
•The device has no on/off switch.
Use an external switch to turn the unit on and off. The switch must
be installed next to the device and must be marked as power
switch for the device - for example with a label.
•Ensure that the maximum electrical load capacity of the switching
outputs is not exceeded, particularly for inductive loads. The power
supply for the user inclusive device is secured with a 1 A fuse,
which means the total of all loads must not reach 1 A.
•In the event of any malfunctions, immediately switch off the Tes-
tomat®Modul NH2CL-R device and inform the service personnel.
Never attempt to repair the Testomat®Modul NH2CL-R device
yourself. Doing so will invalidate the guarantee. Repairs must be
performed by authorized service personnel only.
NOTE
ATTENTION
!

Important safety information
8
During cleaning
•Only use a dry and lint-free cloth to clean the device.
•Maintenance and care instructions are included in the section
Maintenance on page 43 and in the Testomat®Modul NH2CL-R
maintenance manual.
Repairing a defective device
•A defective device, regardless of the guarantee period, can be ser-
viced only when the device is dismantled and the error is de-
scribed. Also inform us of the indicator type currently in use, the
batch number and the measured medium. Make no changes or
modifications to the device that go beyond the scope of use speci-
fied in these instructions. Doing so will void the warranty. This ap-
plies particularly to the measuring chamber holder, the seal of
which must remain undamaged. If you send the device in for re-
pair, completely empty the measuring chamber and remove the in-
dicator bottle and the drain funnel.
Before dismantling, the type of error must be noted (error number,
error effect, log file of the SD card).
•Once a protective device has been triggered (safety fuse), initially
try resolving the cause of error (e.g. by replacing a defective
valve), before reactivating the protective device. Frequent trigger-
ing always signifies an error, which under certain circumstances
may also damage the device.
During disposal
•Dispose of the device in accordance with the regulations of your
country.
Batteries:
The device is built with a removable lithium battery (CR2032 / 3V)
made by VARTA or similar.
Batteries and devices must be disposed of separately! Dispose
of batteries in accordance with the guidelines in your country.

Important safety information
9
Operating requirements
•Problem-free operation of the Testomat®device is only possible
when using Heyl Testomat®regents and only within the pH range
of 5 –9.5! Using external products may invalidate the guarantee.
•Only operate the device within the scope of parameters specified
under section Technical data on page 53.
•When operating without the instrument cover (Art. No. 37798), only
protection class IP 40 is valid.
•Please note that oxidizing agents other than chlorine, e.g. ozone,
chlorine dioxide or hydrogen peroxide, are also recorded and in-
crease the measuring result!
•If the test water contains more than 20 mg/I CO2 (carbonic acid),
erroneous evaluations cannot be ruled out. In this case, use an irri-
gator (e.g. optional accessory from Heyl Co.).
•The water to be measured must be clean and free of bubbles!
•The concentrations of disruptive ingredients can be determined
with colorimetric TESTOVAL® test comparators from Gebr. Heyl.
•Careful handling of the device enhances the operational safety and
the service life! With this in mind, perform a visual inspection of the
device at regular intervals as follows:
oHas the expiry date of the indicator elapsed?
oAre the hose connections of the dosing pump leakproof?
oIs there any air in the dosing hoses?
oAre all water connections leakproof?
oIs the device excessively soiled?
oAre the measuring chamber and drain channel/drain hose
clean?
•Problem-free operation is contingent on regular maintenance!
Maintenance and care instructions can be found in the Mainte-
nance section on page 43.
•Indications of problems can be found in the Error messages and
troubleshooting section on page 34.
Determining the NH2Cl content without free chlorine
Please note! The free chlorine is fully recorded in the Testomat®
Modul NH2CL-R! If you need the pure content of NH2Cl (as Cl2) in
your water sample, you must also determine the free chlorine in your
water sample separately (e.g. with our Testomat®Modul CL device)
and subtract this value from the result of the Testomat®Modul
NH2CL-R.
CAUTION
!
NOTE

Scope of delivery
10
Scope of delivery
1x Testomat®Modul NH2CL-R
1x plastic bag including 2 screw caps with hole and 2 inserts for the
indicator bottles
1 package including 1 plastic bag with drain funnel
1 User manual
Performance specifications
Instrument operation is based on the DPD method according to EN
ISO 7393-2. The analysis is carried out through the addition of two
reagents and the measurement result is obtained after a reaction
time of approx. 60 seconds (pure measurement time without flush
time).
•The device is connected to an overriding control system.
•The output of the measurement values occurs via a 4-20 mA inter-
face and via RS232 interface.
Optional: Display for measured value display in ppm.
•Analysis trigger:
oMeasurement phase mode: A start impulse triggers a sequence
of analyses for the period of between 10 minutes and 12 hours.
oContinuous mode: Analyses are continuously carried out at a set
interval. The analysis interval can be set within the range from
10 to 60 minutes.
•Shared output for the alarm
Connect to the max. 35 VAC / 60 VDC relay.
•Parameterisation with the Service Monitor program (on the SD
card), logging of error and maintenance messages and a firm-
ware update with the SD card
•USB connection for service purposes and for parameterisation
with the Service Monitor program
•History for error and maintenance messages
•Built-in self-test with ongoing monitoring
Interaction with the controller
There are two operating modes for the device:
Measurement phase mode: With a single impulse, the controller
starts a sequence of measurements. The device carries out analyses
for a selected period (measurement phase) in a time interval (meas-
urement interval).
CAUTION
!

Performance specifications
11
Continuous mode: The device performs analyses in a set interval.
The device provides its determined measurement result as a current
value to the controller, which determines the actual measurement
value from the current, for example in ppm.
To calculate the measured value, the control is assigned the measur-
ing range end value of 5 ppm to the current value of 20.0 mA.
After an analysis, a current corresponding to the measurement value
is output. It is only adjusted to the new measurement value after the
subsequent analysis.
In measurement phase mode, a current of 4 mA shall be output out-
side of the measurement phase.
When using the RS232 interface, the Testomat®Modul NH2CL-R
transfers its determined measurement result to the control system. All
measurement data and error messages are always transferred to the
RS232 interface, even if they are not used.
Measurement calculation
The current is calculated internally according to the following formula:
Thus, the measurement from the emitted current is calculated as fol-
lows:
The following table gives an overview:
Current in mA
Concentration in ppm
8
1,25
10
1,88
12
2,5
15
3,44
20
5
Measurements above 5 ppm
Attention! At concentrations > 5 ppm, 20 mA are emitted.
NOTE

Assembly
12
Assembly
Hazard due to defective assembly!
Assemble the Testomat®Modul NH2CL-R device in a location
shielded from drips and splashes of water, dust and aggressive
substances –e.g. in a switching cabinet or on a suitable wall.
Notes for problem-free operating procedures
Assemble the Testomat®Modul NH2CL-R device vertically and
without mechanical stresses.
Assemble the Testomat®Modul NH2CL-R device in a location free
of vibration.
Assembling the Testomat®Modul NH2CL-R
Requirements for the installation site
We recommend short intake lines (under 3 m) to the Testomat®
Modul NH2CL-R. For intake lines longer than 3 m, purge periods of
longer than 60 s must be configured (see section Internal “Flush time”
on page 29).
Measurement error under strong incidence of light
When installing and operating without the instrument cover (Art. No.
37798), avoid direct sunlight or strong incidence of light, as this may
impair the measurement.
Drill the mounting holes as specified in the accompanying
sketches.
Secure the device with three screws in a suitable place in the
switching cabinet or on the wall.
Use of the Testomat®Modul NH2CL-R within a
pressure range of 0.3 to 1 bar
Before assembling please check whether adaptation to a lower work-
ing pressure is required. When delivered, the device is equipped for a
pressure range of 1 to 8 bar. To operate the device within a pressure
range of 0.3 to 1 bar, the flow controller valve body should be re-
moved (e.g. when using a type R mini irrigator, see section Additional
accessories on page 52). For this purpose, take the locking pin 
from the controller/filter housing . Then pull the controller plug 
on the metal brackets out of the drill hole. Then remove the flow con-
troller valve body and re-insert the controller plug and locking pin.
NOTE
NOTE




Remove the
flow controller
valve body for a
pressure range
of 0.3 to 1 bar
CAUTION
!

Assembly
13
At pressures under 0.3 bar or when sucking out of a tank, our Me-
puClip booster pump can be used (see section Additional accesso-
ries on page 52).
Connecting the water intake and discharge
When using a cooler
Water exceeding 40 °C may lead to burns and may damage the
parts of the Testomat®Modul NH2CL-R exposed to the water.
Notes for problem-free operating procedures
The water pressure must be within the range 0.3 to 8 bar.
To operate within a pressure range of 0.3 to 1 bar or when supply-
ing via a booster pump, please remove the controller valve body
from the controller and filter housing. The pump should have a ca-
pacity of 25 to 35 liters/hour and be correspondingly resistant to
the medium being measured (e.g. our booster pump MepuClip Art.
No. 270410).
For operation exceeding 8 bar, a pressure reducer must be used.
Significant pressure fluctuations should be avoided.
The measurement water temperature must be between 10 and
40 °C.
For water temperatures exceeding 40 °C, a cooler must be in-
stalled in the intake of the Testomat®Modul NH2CL-R.
Water intake
The test water is extracted from the sampling pipe and channelled to
the supply nozzles of the Testomat®Modul NH2CL-R. The device
comes with a plug connection for plastic hoses 6/4 x 1 as standard
(external diameter 6 mm / internal diameter 4 mm, wall thickness 1
mm).
Connect the water intake of the Testomat®Modul NH2CL-R di-
rectly to the sampling pipe directly behind the water treatment
plant.
Always establish the connection vertically upwards, to prevent dirt
particles from being conveyed from the sampling pipe to the de-
vice.
Assemble a manual stop valve in the water intake to the Tes-
tomat®Modul NH2CL-R.
For the water intake use opaque plastic pressure hose 6/4 x 1
(max. length 5 m).
Purge the water intake to remove dirt particles.
NOTE
CAUTION
!








Assembly
14
Water drain
The water is conveyed through the measuring chamber via an open
funnel and the drain hose installed on the same and into the duct.
Remove the supplied funnel.
Accommodate the funnel underneath, in the recess of the hous-
ing designated for that purpose.
Connect the funnel of the Testomat®Modul NH2CL-R with a drain
hose (internal diameter 12 mm).
Lay this hose free of back pressure and without the siphon ef-
fect to the drain .
Connect mains and devices
Connect the device only to a 24 VDC power supply.
Risk of injury from assembly when voltage is present!
Unless you disconnect the power supply before commencing assem-
bly, you risk injury, destruction of the product or damage to system
components.
Disconnect all power to the relevant system component before as-
sembling the Testomat®Modul NH2CL-R device.
When connecting, use only verified cables with sufficient line
cross-section (see Requirements of cable for operating voltage
and system components and installed lines on page 6).
Danger of damage due to electromagnetic fields!
If you assemble the Testomat®Modul NH2CL-R device or connecting
cables parallel to mains cables or in the vicinity of strong electromag-
netic fields, the device may be damaged or the measurement dis-
rupted.
Keep the connecting cables as short as possible.
Lay the connecting cables and mains cables separately.
Shield the device from strong electromagnetic fields.
WARNING
!
CAUTION
!

Assembly
15
Block diagram of Testomat®Modul NH2CL-R
Illustrated position of relays: Device without current

Assembly
16
RS232
Connecting inputs and outputs
Correct connection of the inputs and outputs
Incorrect connections will damage the device!
Do not expose the connections to any external voltage!
Ensure that the cores in the terminals are securely in place.
A detailed description is included in section Description of the signal
inputs and outputs on page 32.
Terminal des-
ignation
Type
Function
Note
OUT +
OUT -
OUT
Current loop 4 - 20 mA
Galvanically isolated
START
GND
IN
External start/stop of analysis
Ground
Only connect isolated
break contacts/closing
contacts!
GND
IN
Ground
RxD
TxD
IN
OUT
RS232 interface
Not galvanically iso-
lated (RxD currently not
in use)
Terminal des-
ignation
Type
Function
+ / -
Operating voltage
24 VDC
NO
Alarm output –NO contact
floating relay output/
max. 35 VAC/60 VDC
C
Alarm output –Root
floating relay output/
max. 35 VAC/60 VDC
NC
Alarm output –NC contact
floating relay output/
max. 35 VAC/60 VDC
CAUTION
!

Assembly
17
Internal design Testomat®Modul NH2CL-R

Control circuit board,
Base circuit board with terminal strips for inputs and outputs is behind
it

Cable gland on both sides

Dosing pumps

Optical unit (sender right/receiver left)

Solenoid valve

Water connections, inlet and outlet

Controller / Filter receiver

Measuring chamber











Commissioning
18
Commissioning
Handling of reagents
Adhere to the respective safety data sheet!
Be careful to ensure that Heyl reagents are used!
Using external products may result in considerable measurement de-
viations or measurement errors. Damage caused by foreign particles
in the area of the dosing pump, measuring chamber or valves is also
possible. This may invalidate the guarantee!
Inserting the reagent bottle
Remove the cover of the Testomat®Modul NH2CL-R. To do this,
raise the cover slightly and push it forward to remove it.
Remove the cap from the indicator bottle.
Remove the plastic bag from inside the lower housing door. The
plastic bag contains the screw cap with hole and the insert 
for the screw cap.
➢Place the insert into the bottle .
➢Screw the screw cap with hole hand-tight onto the bottle .
Place the bottle underneath the dosing pump. Observe correct al-
location of the reagents A and B to the dosing pumps: AM = left,
B = right.
Push the intake hose hand-tight onto the hose connector of the
insert .
Opening the water inlet
Slowly open the manually operated shut-off valve to prevent the
measuring chamber from overflowing. The flow controller re-
quires a few seconds to function correctly.
Make sure that the water conducting parts are not leaky.
If water sprays from the tube of the measuring chamber , re-
duce the amount of inlet water via manually operated shut-off
valve. It should take 2 to 6 seconds to fill the measuring chamber!
CAUTION
!


Measuring chamber 
with tube 

Commissioning
19
Venting reagent lines
During operation, the pump (PERIClip) automatically extracts rea-
gent.
The pump’s suction hose and transport hose must be filled with
the reagent up to the measuring chamber so reagent is present for in-
itial analyses.
Switch the instrument on and press the Manual button on the cir-
cuit board.
Press the Manual key at the pump several times until the intake
hose and the transport hose are filled up to the measuring
chamber.
If necessary, manually tighten the hose connectors of the intake
and transport hose slightly in case of bubble formation.
Press the Manual button on the circuit board to quit standby mode.
The device starts the analysis.

Functions of the operating and display elements
20
Mini
USB
Internal
interface
BOOT
Slot optional display
Functions of the operating and dis-
play elements
Function keys
The Manual function key is used to start the standby mode which
prevents the intermittent start of an analysis. The yellow LED flashes
above the key in the process. After pressing the key again, the
standby mode is cancelled again, and an analysis starts. During an
analysis, the key flashes.
Acknowledge error and maintenance messages with the Alarm func-
tion key. An alarm message (key lights up red) is acknowledged
when the error has been corrected. The key’s light goes out. A
maintenance message (the LED above the key lights up yellow) is
acknowledged when the maintenance work has been performed.
You can set the indicator stock to 100% with the 100% function key
(see section Changing an empty indicator bottle on page 45).
Additional control elements on the circuit board
•RESET key: To reset the controller, proceed as for switching on
and off.
•BOOT key: Used for firmware update and selection mode.
•Plug-in slot for SD card: For parameterisation, errors and mainte-
nance messages and firmware updates
•USB socket: For connecting a computer to the service monitor for
parameterisation.
•Battery holder: The battery holder houses a CR2032 lithium bat-
tery to retain the time setting even if the device is switched off.
Manual
100%
Alarm
RESET
Battery holder
Mini
USB
Slot for
SD card